漏磁通量 的英文怎麼說
中文拼音 [lóucítōngliáng]
漏磁通量
英文
magnetic leakage flux-
The small part which returns via an air path is called the leakage flu and is indicated by dotted lines.
一小部分經空氣路徑返回的磁通量，叫做漏磁通量，並用虛線畫出。Methods for magnetic leakage flux testing
漏磁通量測試方法And the subroutine is developed to add the periodic condition in the commercial 3d fem software. 3d electromagnetic field analysis is done to analyze the magnetic flux distribution in the tfpm. base on the field analysis, the mathematical model is given
採用簡化的三維電磁場計算方法對橫向磁通永磁電機內部磁通分佈進行了研究，計算了各部分的磁通密度分佈和漏磁通的走向，得到了電機的空載漏磁系數及空載反電動勢以及主要的漏磁通分量。Then a thorough analysis to the bias - magnetic of ppfc is made. the retraining effects of the main parameters ( include clamping capacitance c, output filter inductor lf, load r, the leakage inductor ls and source winding resistance r ) are studied under the conditions of different von, different ton and different winding parameters. then a conclusion can be drew, that the smaller lf and the bigger r are, the better the bias - magnetic is restrained and c has a best value to retrain the bias - magnetic
分別對管壓降不同，導通時間不同以及兩原邊繞組參數不一致（包括漏感、電阻、激磁電感三種情況）的情況下，主要參數（包括箝位電容c 、輸出濾波電感lf 、負載r 、原邊繞組漏感ls 、原邊繞組電阻r ）對偏磁的抑制作用進行了模擬分析研究，得出lf越小， r越大時激磁磁勢偏移量ni越小， c在其他參數確定時對抑制偏磁有最優值等結論，為參數的優化設計提供了依據。The main achievements are as follows : the theory models of defect mfl field are set up ; based on the magnetic dipole model and finite element model, the distribution of defect mfl field is simulated in the dissertation ; the component of flux density ( magnetic filed ) parallel to the surface of pipe is detected by a circumferential array of hall probes ; the factors including defect geometry parameters, defect surface angle and shape, pipe material, field intensity, vehicle velocity, background magnetization, operating pressure and remanent magnetization and so on influence the mfl signal characteristics
採用霍爾元件作為缺陷漏磁檢測傳感器，獲得管道軸截面漏磁場切向分量的漏磁信號；研究了缺陷外形尺寸、缺陷傾角和形狀、管道材質和磁化強度、檢測儀移動速度、管道背底磁場、管內壓力和剩磁對漏磁信號的影響。提出了各通道增益放大、各路漏磁信號偏離調整、波形微分、數字濾波和平滑等漏磁信號預處理方法；分析了等空間采樣的漏磁信號轉換為等時間采樣信號的必要性，研究了漏磁信號的小波去噪方法。Based on the analysis about the test requirements and the saturated magnetization of the armor plate, the excitation magnetic circuit satisfying the testing condition and a validation system are designed. because the geometric, of the magnetic leakage at the direction of the normal of the roundness fault has the feature of two peaks : a positive and a negative, using the linear regression and the software matlab, two regression equation are proposed : one is about the peak value of the magnetic leakage and the diameter and depth of the roundness fault ; the other is the distance between the two peaks and the diameter of the roundness fault. the result of the validation system proves that the two equations are valid, and an applied method using for quantificationally inspecting the roundness faults is proposed according to the two equations
根據實驗要求，通過對鋼板達到飽和磁化的必要性進行的分析，設計了符合試驗條件的勵磁磁路，並設計了一套實驗驗證系統；根據圓形缺陷法線分量漏磁場幾何圖形正負雙峰值的特點，採用線性回歸擬合的原理和matlab軟體及其統計工具箱中的相關函數，給出了圓形缺陷漏磁場幾何圖形的峰峰值與圓形缺陷的直徑和深度以及峰峰值間距與圓形缺陷直徑的兩個回歸擬合方程，並通過實驗驗證系統驗證了擬合方程的正確性，利用這兩個簡單實用的擬合方程，提出了一種工程定量檢測圓形缺陷的應用方案。According to the effective field expression which has been derived in former, the phenomenon that the tangential component of magnetic leakage field has maximum value and the normal component of magnetic leakage field acquires zero value at the stress concentration zone of positive magnetostriction ferromagnetism materials under the application of tensile stress and negative magnetostriction ferromagnetism materials under the application of compressive stress is explained theoretically through analyzing and discussing
根據所得到的地磁場中受力鐵磁性材料有效場表達式，通過分析討論，解釋了受拉力作用的正磁致伸縮鐵磁材料和受壓力作用的負磁致伸縮材料在應力集中處漏磁場切向分量出現最大值、同時法向分量為零值的現象。This dissertation concentrates on the difficult problems that the pipeline or pipe defects are not estimated or evaluated quantitatively, intelligently by mfl ( magnetic flux leakage ) inspection method. from the practical demand, theoretical analysis and experiments or testing, the mfl inspection technology of pipeline or pipe defects are explained, summarized in detail in the whole paper, at the same time, the relationship between the mfl field distribution, the mfl signal shape and the defect geometry or severity, the analysis of the mfl data and the compensation of influencing the relationship factors, signal feature extraction, intelligent recognition of defect parameters and so on are studied systematically
論文針對管道（鋼管）缺陷漏磁檢測定量化、智能化的難題，緊密結合檢測現場實際需要，通過理論分析和大量實驗，系統分析總結了管道（鋼管）缺陷漏磁智能檢測技術，並在缺陷漏磁場分佈以及缺陷漏磁信號與缺陷外形參數間的關系、缺陷漏磁信號分析、漏磁信號影響因素補償、缺陷漏磁場波形特徵提取和缺陷外形尺寸定量識別等方面進行了深入研究，主要成果和創新如下：引出磁偶極子模型近似分析常見缺陷漏磁場，針對磁偶極子模型的不足，將有限元方法應用到缺陷漏磁場分析，實現了常見管道樣本缺陷漏磁場的模擬。Research and summary for stray losses and overheating control on metal parts caused by leakage flux of transformer has been given by author in this article through a lot of tests on site, meanwhile, the analysis has been given by electrical - magnetic theory also
本文運用變壓器電磁學理論，通過進行大量探索性試驗，研究並總結出如何控制由於變壓器漏磁引起的附加損耗以及金屬構件中的溫升。Combined with the research project of the advanced performance of wire rope in the port cranes, a key technological problem of the ministry of communications, this dissertation investigated the stress - effect on the magnetic flux leakage ( mfl ) of wire ropes and the law of the mfl signal changes during wire rope fatigue testing by experiments and modern signal processing methods based on the ferromagnetic theory, being aimed at the present problems of current wire rope testing technology. the characteristic parameters and quantitative descriptive specifications for wire rope defective signal were analyzed in detail. this dissertation present a novel method of quantitatively evaluating locate faults ( lf )
本文結合交通部重點科技項目「港口起重機鋼絲繩傳動件的高性能技術研究」 ，針對當前鋼絲繩電磁檢測技術中所存在的問題，以鐵磁學為理論基礎，以試驗和現代數字信號處理技術為手段，對鋼絲繩漏磁信號的應力效應、鋼絲繩疲勞損傷歷程中的漏磁信號變化規律做了深入的研究，對鋼絲繩缺陷信號的特徵參數和缺陷的定量描述指標做了詳細的分析，提出了一種局部缺陷的定量逼近方法。分享友人